Recent content by qftqed

Homework Statement Let F be a field with p\inN, a prime natural number. Show that either X^{p}-\alpha is irreducible in F[X] or \alpha has a pth root in F Homework Equations The Attempt at a Solution I'm trying to do this without making reference to the field norm, so far I've...

Ah, well now it seems obvious haha. I suppose having the question asked in the context of special relativity introduced unnecessary mystery to an otherwise simple problem. Even then, when I think about it, it's simple. Thanks (= case closed!

Hello folks! I have just come from a night at the pub with fellow students of life where over many a pint several mysteries of the universe were discussed. One of my friends asked me a question concerning special relativity that initially took me by surprise and which has me wondering about the...

Excellent! Thanks, I'm quite sure I can work with this.

Hello there, thanks for the speedy reply! We've not been given details on the geometry of the magnetic field, only the words 'purely radial'. I do know what the equation means, and in fact I think (hope) I'm making some progress. I've decided B2 is better off being written as a dot product of...

Hello! I have an assignment question that is a proving a real stone in my shoe, mostly because it is reminding how little I can recall about electromagnetism. It is part of a series of questions leading to the calculation the Alfven radius, where the solar wind decouples from the Sun's magnetic...